Acetylene-generator.



W. W. HARRIS.

ACETYLENE GENERATOR.

APPLICATION FILED JULY 28. 1909.

Patented Oct. 19. 1915.

3 SHEETSSHEET 1.

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IN VE N 70.?

W. W. HARRIS.

ACETYLENE GENERATOR. APPLICATION FILED JULY 28. 1909.

Patented 00t.19, 1915.

3 SHEETS-SHEEI 2 WITNESSES:

W. W. HARRIS.

ACETYLENE GENERATOR.

APPLICATION FILED JULY 28. 1909.

1,157,385. Patented 001;. 19, 1915.

3 SHEETS-SHEET 3.

INVENTOR ATTORNE r6.

UMTED STATES PATENT @FFTCE.

WILLIAM W. HARRIS, OF NEW YORK, N. Y., 'ASSIGNOR-TO VAN GLECKLAND INC., A CORPORATION OF NEW YORK.

ACETYLENE-GENERATOR.

Specification of Letters Patent.

' Patented Oct. 19, 1915.

Application filed July as, 1909. Serial no. 510,065.

To all whom it may concern:

Beit known that 1, WILLIAM W. HARRIS, acitizen of the United States, residing at the borough of Manhattan, in the county of New York and State of New York, have ivented certain new and useful Improve- .rents in Acetylene-Generators,,of which the following is a full, clear, and exact specification.

This invention relates to acetylene generators, its main object being to provide an acetylene generator with carbid feeding means of such character that the carbid is positively delivered in gradual amounts proportionate to the required consumption of gas.

The construction of my carbid feeding means is such that the delivery of the proper amount of carbid is insured, and at the same time precludes delivery of carbid in excess of such proper amounts, so that the generation and delivery of .gas is maintained under very even pressure.

According to my invention the carbid is fed by means of a plunger having a series .of apertures of proper capacityin relation to the required gas consumption, said plunger being preferably constantly guided in its movement through an orifice in the wall of 30 ..the carbid reservoir, thus obviating the necessity of the usaahconcentric guides, and reducing the friction to a minimum. The construction of the plunger of my feeding means is such as to work readily through the orifice in the carbid reservoir, the aperture of my plunger being capable of receiving'carbid and delivering the contained carbid through the orifice with a minimum amount of friction between the carbid, and orifice and partitions between the apertures. These advantageous results ensue by reason of the partitions separating the apertures in my plunger-being of less cross-sectional area than the opening of the orifice. Furthermore, my carbid feeding means is such that it is operable with a.minimum amount of friction, and sufficiently sensitive in its action to accurately regulate the pressure of generated gas. My construction-of acetylene generators embodies a safetydevice cooperating with the carbid feeding means which is adapted to operate whenever a certain pressure of generated gas is exceeded from any cause, Whatever, and whether the generator 1s 1n 1ts normal, or 1n an abnormal position, whereby the feeding of the carbid is positively and automatically'stopped the moment that the generated gas pressure exceeds a predetermined amount.

Other objects of the invention relate to the construction and relation of the water and carbid reservoirs.

Another object of the invention is to provide a method of feeding carbid which is eflicient in producing evenness of gas'pressure.

Other and ancillary objects of the invention will appear hereafter.

In the accompanying drawings which illustrate the invention, Figure 1 is a view, partly in side elevation and partly in vertical section, of an acetylene generator; Fig. 2 is a vertical section of the upper portion of the generator showing the feeding mechanism and other details; Fig. 3 is a central longitudinal section of a carbid feed valve; Fig. 4 1818, transverse section on the line zvw of Fig. 3; Fig. 5 is a side elevation of the valve shown in Fig. 3; Fig. 6 is a side elevation of a portion of a modified form valve structure; Fig..13 is a section on the line tt of Fig. 12 Fig. 14 is a longitudinal section of another form of valve structure; Fig. 15 is a section on the line u. u of Fig. 14; Fig. 16 is a longitudinal section of another form, of valve structure; Fig. 17 is a section on the line o@ of Fig. 16; Fig. 18 is a view of still another modified form of valve structure, shown partly in side elevation, and partly in section, a fragmentary portion of the carbid reservoir being also shown; Fig. 19 is a topplan view of the valve structure shown in Fig. 18; Fig. 20 is a section on the line ww of Fig. 18; Fig. 21 is a side elevation of a modified valve structure; Fig. 22 isa top plan view of the same; Fig. 23' is a side elevation of another modified form of valve structure and Fig. 24: is a top plan view of the valve structure shown in Fig. 23. 1

Referring to the drawings, and first to Figs. 1, 2, 3, 4 and 5, 1 is the lower part of the apparatus and constitutes the water reservoir, the upwardly extending walls of which form a generating chamber, and also afi'ord space for partially receiving the carbid reservoir 2. The upwardly extending walls of the Water receptacle terminate with an outward flare forming a gasket seat 3 and are'attached at the upper and outer extremity to an-annular ring i. The main part of the carbid reservoir is formed by the shell 5 of sheet metal, its upper edge being' rolled outward to form a bead (3. over which is stretched the flexible part 7 of the yield-able wall forming the top wall of the carbid reservoir. The flexible diaphragm is molded to have an inner central opening, the edge or rim 8 about said'opening being somewhat thicker than the part 7. The normal diameter of the inner opening is slightly smaller than the diameter of the circumferential groove in the lower part of the weight 9, in which groove the edge 8 is entered, so that when the edge is entered in.

said groove the rubber of said edge 8 is under tension. The outer edge or rim of said diaphragm is also thicker than the part 7, said outer edge being stretched in order to position the same over the upper part of the carbid reservoir. In thepreferred forms of my construction said outer edge of part 7 is of sufficient thickness to form a gasket about the edge or bead (3. The normal shape of the part 7 intermediate the .inner and outer edges of said diaphragm is that shown 'ionveved to a burner.

suitable means.

in Fig. 1. limits of movement of the diaphragm and the weight, the part 7 is under proper tension to be highly responsive to varying changes in the pressure of, the gas. The yieldable wall is held firmly in position by a cap or cover 10 which is secured in place by any The ring 11 may be'provided with a flange 12 overlapping the lower portion of the cap 10, the lower portion of said ring 11 being provided with a screwthread cooperating with the screw-thread of the rin 4i, whereupon screwing the ring 11 to the ring 4 the main separable parts of the generator are held together. The generated gas passes through the carbid feed opening into the carbid reservoir, and thence passes through a filter cloth 13 secured in a seat in the weight 9 by any suitable means, such as a retaining ring 14. Thence the gas passes through the pipe 15 and the flexible connection 16 to the nipple 31, whence it may be Between the cover 10 and the weight 9 is interposed a coiled spring17, the tendency of which is to force the weight downwardly. The flexible part Thus throughout the working,

7 obviously permits the weight 9 to move up or down according to the prepondenance of the forces acting upon it. The gas pressure in the carbid reservoir tends to raise this weight 9, while on the other hand the spring 17 tends to force it downwardly. Secured to the weight 9 is a tubular post 18 within which slides a plunger 19 having a ball 20 or other suitable'device to facilitate grasping by the fingers. The upper end of the post 18 is restricted so that the lower enlarged end 21 of the plunger 19-cannot pass therethrough. Upon grasping the ball 20'it will move outward a certain distance, when the enlarged lower end of the plunger will engage the upper end of the post 18, and

thereafter through upward movement of the plunger-will carry the weight 9 and its connected parts with it. It will be apparent that any effort to push the plunger downwardly will not be transmitted to the weight 9, but the plunger will simply slide within the post and after the plunger has been pushed down a certain distance it will engage with the lug 22 upon a stationary part of the apparatus and its further downward movement will be prevented. At one side of the post 18 a spring-pressed latch 23 is pivoted upon a stationary part, such as the cap 10, and the spring pressure is such that the nose of the latch is always thrown toward the post. Upon the post is a groove 2%, within which the nose of the latch 23 is adapted toenter and lock the post, and with it the weight 9 and its attached parts, in ele-' vated position. spring-pressed toward the post 18, it will be apparent that the latch 23 is adapted atall The latch 23 being always groove in the tubular post. Secured to the weight 9 is a valve 25 which extends through an orifice in the walls 5 of the carbid receptacle. In this valve are lateral recesses, one of which comprises a series-of pockets 26, while upon the opposite side of the valve the lateralrecess is composed of a series of pockets 27.

In order that there may be suitable clearance between the outer edges, as 28 and 2 of the partitions between the pockets and the wall of the orifice through which the valve-passes, the valve is so constructed that these outer edges are at a, less distance from theaxis of the valve than the radius of the orifice. Also, in the construction shown, this distance of the outer edges of the valve pocket partitions fromt-he axis of the valve is less than the radius ofthe valve at the points of termination of the series of pockets. The valve as shown'in'Figs. 3, 4 and 5 is constructed of an outer tube 30, within which is fitted a rod, upon'opposite sides of which the pockets 26 and 27, as described,

are cut. The tube has two slots cut in opposite sides of it and the rod inwhich the pockets are cut is inserted within the tube so that the pockets are opposite'the slots.

The diameter of'the tube 30 is such that it slides easily within the orifice inthe carbid reservoir and is guided by the walls thereof throughout its operative movement.

In the position of the apparatus as shown v in Fig. 2, the yieldable wall of the carbid reservoir is at its lowest point and the carbid feed is cut oil. In the position of the parts as shown in Fig. 1, the'carbid feed' is also shut 01f, but the yieldable wall is at the 7 upper limit of its travel.

In the position as shown in Fig. 1, or in any position in -which the pockets are within the carbid 2-5 reservoir, these pockets will be filled with .the carbid, and upon decrease of gas pressure the weight 9 will fall, carryingwith'it the valve 25 and causing oneor more of the that the feeding of the carbid consists in emptying one or moreof the pockets into the water chamber, generating gas and thereby raising the pressure, "drawing the pockets up into the carbid chamber, where they are again refilled, and again moving them throughthe wall of the carbid reservoir and emptying one or more of the pockets into the water. It will be observed that the pockets cause the carbid to become separated into pocketfuls or masses, and that the amount of carbid which is precipitated into the water depends upon the number of pockets which pass throughthe orifice in the carbid reservoir, so that the separated masses which compose their contents are discharged into the water reservoir. The number of these pockets which are so discharged at any one timewill depend upon the amount of gas withdrawn sothat the method employed in feeding 1 the carbid consists in intermittently feeding the carbid inone or more separated masses, the number of masses fed at any one time being dependent upon the withdrawal of gas. It will also appear that when the valve is at rest or is moving upwardly no carbid will be fed, but that it will be upon down- -the closure in closed the valve is. moyed"upwardly..

-orifice in the reservoir wall.

ward movement, that is, upon decrease in gas pressure, only. To permit access to the carbid reservoir for the purpose of supplying it with carbid, there is an opening supplied with a hinged closure 32 and provided with a spring 33 which engages with the interior of the water reservoir and holds position when the parts are assembled.

In the modification of the valve shown in Figs. 6, 7, 8 and v9 a tube 34 has inserted within it a rod 35 having a reduced section,

36 upon which are turned the rings 37 which'- form the series of pockets, there'beingslits 38, 39, 10 and 41 in the tube to permit access to the pockets. In Figs. 6 and 8 the pockets are of gradually increasing size, the largest being at the top.

The construction shown in Figs. 10 and 11 is similar to that described except that the central rod is turned with a screw-thread 42 to form the pockets.

Figs. 12 and 13'sh'ow a structure formed of a solid rod -in which the sides are grooved out and partitions, as 43,. left to separate the pockets.

.In Figs. 14 and 15 is a tube 44 having a slot 45' in one .side, and upon one side of the rod 46, which is within the tube, is cut a se- 'ries of pockets, indicated at 47, said pockets being of different size.

In the modification shown in Figs. 16 and 17, thereissimply a tube 48 having plugs 49 and 50 inserted therein, while in the sides 1 of the tube are cut slots 51, 52, 53 and 54, i in this case the lateral recesses being so deep as to be merged into each other.

In the structure shown in Figs. 18, 19 and 20, the cone-shaped diameter of the carbid chamber is represented by 62, in the orifice of which is a valve member comprising the cone-shaped body'portion' 55 secured to the operating 5136111 56, which may be secured to the upperyieldable wallof the carbid reservoir. Secured to-the body portion are the upright-rods 57, 58, 59 and 60, the outer edges. of which extend beyond the outer edges of the coneshaped portion so as to effect a suitable clearance for ease of operation, the outer edges of the bars 57 to 60, inclusive, bearing against the wall of the Upon downward movement of the valve from the position shown in Fig: 18, the carbid flows between the'rods 57 to 60, inclusive, and over the body portion down into the water chamher. In the position shown in Fig. 18, the

carbid feed is shut off. To shut off the carbid feed at the lower limit of movement of the valve a'stop' consisting of a coiled wire 61 secured upon the stem 56, said coiled wire 61 formingthe upper wall of the recess and operating as a resilient upper stop to retard the passage of carbid when the valve is at its lower position.

&

In the modification shown in Figs. 23 and 24: the stem 75 extends to the valve body 76, but instead of rods the guiding of the valve is effected by wings 7 7, 7 8 and 79 extending radially from the stem.

It will thus be seen that I have described several forms of my plunger having openings of various character so that the carbid may enter, find lodgmeiit therein and be fed into the water reservoir in accordance with my invention.

Certain features of the construction and operation of my acetylene generator are also disclosed in my co-pending application, Serially Numbered 559,561, and filed May 5, 1910.

\Vhile I have illustrated the invention in what I consider to be its best embodiments, it may be employed in other structures without departing from the spirit of the invention, which is not therefore limited to the structure shown.

Having thus descr bed my invention, what I claim as new and desire to secured by Letters Patent, is:

1. In an acetylene generator, the combination with a Water reservoir, of a carbidreservoir, and means for feeding the carbid from said carbid reservoir directly into said water reservoir, said feeding means extending through an orifice in said carbid reservoir into said water reservoir, and being guided throughout its operation by the sides of said orifice, the thickness of the sides of said orifice being less than the height of any pocket, said feeding means having one or more partitions forming a plurality of pockets, said partition or partitions being of less horizontal dimension than the horizontal dimension of'said orifice to provide an open clearance between said partition or partitions and the sides of said orifice. v

Q. In an acetylene generator, the combina-' tion with a water reservoir, of a carbid reservoir, means for feeding the carbid from' said carbid reservoir directly into said water reservoir, said feeding means extending througli'an orifice in said carbid reservoir into said water reservoir, and being guided throughout its operation by the sides of said orifice, said feeding means having one or more partitions forming a plurality of pockets, said partition or partitions being of less horizontal dimension than the horizontal dimension of said orifice to provide an open cl +arance between said partition or partitions and the sides of said orifice, and means for suspending said feeding means near its upper end.

3. In an acetylene generator, the combination with a water reservoir, of a carbid reservoir, feeding means extending through an orifice in said carbid reservoir into said water reservoir, said feeding means comprising a plunger provided on one side of the portion thereof which in operation passes through said orifice with one or more partitions forming a plurality of apertures, the terminus or termini of said partition or partitions being inside the periphery of said plunger to provide an open clearance between said partition or partitions and the edges of said orifice.

4. In an acetylene generator, the combination with a water reservoir, of a carbid reservoir having an upper flexible wall, means said feeding means having one or more horizontal partitions forming a plurality of openings, which openings increase in capacity upwardly, said partition or partitions being of less horizontal dimension than the horizontal dimension of said'orifice to provide an open clearance between said parti- I tion or partitions and the sides of said orifice, and means for suspending said feeding means from said flexible wall.

5. In an acetylene generator, the combination with a water reservoir, of a carbid reservoir having a yieldable Wall, means whereby the movement of said yieldable wall is controlled by the pressure of the generated gas, means for feeding carbid from said carbid reservoir into said Water reservoir, said feeding means extending through an orifice in said carbid reservoir into said water reservoir and having one or more partitions forming a plurality of pockets of varying capacity, said partition or partitions being of less dimension than the dimension of said orifice to provide an open clearance between the said partition or partitions and the-sides of said orifice, and means whereby the movement of said feeding means is controlled by said yieldable Wall. I

6. In an acetylene generator, the combination with a Water reservoir of a carbid reservoir fitting within the same, said carbid reservoir being provided with a closure for an opening through which carbid is introduced into said carbid reservoir, and means engaging said closure and the side of said water reservoir for securing the closure in closed position. r

7. In an acetylene generator, the combination with a water reservoir of a carbid reservoir, a feeding means for the carbid comprising a valve extending through an orifice in said carbid reservoir and having a series of pockets, the diameter of said valve at the points of termination of said series of pockets being greater than the diameter of the cross-section of the partitions between the pockets, said valve being guided throughout its operative movement by engagement with the walls of said orifice.

8. In an acetylene generator, the combina' tion with a water reservoir of a carbid reservoir, said carbid reservoir having a yieldable wall comprising flexible material, the outer edge of said flexible material forming a ga sket for packing between said reservoirs.

9. In an acetylene generator, the combination with a water reservoir of a carbid reservoir, of means including a flexible element for controlling the feed of the carbid from said carbid reservoir, said means being responsive to the pressure of generated gas, and a safety device adapted to lock the feeding means in position to cut off the feed ofcarbid, said safety device being'adapted to operate at all times when a predetermined pressure of generated gas is reached.

10. In an acetylene generator, the combination with a water reservoir of a carbid reservoir, of means for controlling the feed of the carbid from said carbid reservoir, said means being responsive to the pressure of generated gas, and a safety device for locking the carbid feeding means in a position to cut oif the feed, said safety device being adapted to operate automatically, whenever a predetermined pressure of generated gas is reached, to lock the feeding means in position to out off the supply of carbid, said safety device being manually releasable to unlock the feeding means.

11. In an acetylene generator, the combination with a water reservoir of a carbid reservoir, means for controlling the feed of the carbid from the. carbid reservoir, said means being responsive to the pressure of generated gas, a safety device adapted'to lock the feeding means in position to cut ofi the feed of carbid, said safetv devioebeing adapted to operate at all times when a predetermined pressure of generated gas is reached, and means for manually moving the feeding means to locking position, the manual means being incapable of moving the feeding means in a direction to feed the carbid from its reservoir.

12. In an acetylene generator, the combination with a water reservoir of a carbid reservoir, means including a flexible element for controlling the feed of the carbid from the carbid reservoir, said means being responsive to the pressure of generated gas, a safety deviceladapted to lock the feed controlling meansin position to cut off the feed of carbid, said safety device being adapted to operate in all positions of the generator when a predetermined pressure of generated gas is reached, and capable of being manually moved to locking position.

said opening.

' weight, the outer edge of said flexible part forming a packing between the carbid and Water reservoirs against leakage of gas when the. water reservoir and carbid reservoir are secured together.

In an acetylene generator, the combi-. nation with a water reservoir, of a carbid receptacle, means for feeding the carbid from said carbid receptacle, said feeding means comprising a plunger extending throughan. orifice in said carbid receptacle and having one or more apertures, the termini of sa d aperture or apertures being at points inslde the peripheral edge of said orifice to provide an open clearance between the peripheral edge of said orifice and the termini of said aperture or apertures.

15. In an acetylene generator, the combination with a water reservoir, of a carbid. receptacle having a yieldable wall, means whereby said yieldable wall is moved in response to the pressure of the generated gas means for feeding carbid from said carbi receptacle, said feeding means comprising a plunger extending through an orifice in said carbid receptacle, saidplunger having one or more openings for carrying the carbid, the termini of said opening or' openings being at points inside the peripheral'surface of said plunger, to provide an open clearance between the said termini and the edges of said orifice, and means whereby said feeding means is 'moved corresponding to the movement of said yieldable Wall. 16. In an acetylene generator, the combination with a water reservoir of a carbid reservoir, said carbid reservoir being provided with a closure for an opening through which carbid may be introduced into said carbid reservoir, and means interposed between said closure and said water reservoir for maintaining the closure, in closed position, said means cooperating with said water reservoir. I 1 17. In an acetylene generator, the-combination with a Water reservoir, of a carbid receptacle, a yieldable memberya valve seat constituting a feed passage between said car-' bid receptacle and said water reservoir, and

. a feed plunger reciprocally carried by said carbid, the terminiof said opening being at points inside the periphery of. said plunger to provide an open clearance between the sides of said valve seat" and the termini of 18. In an acetylene generator, the combination with a water reservoir and a carbid reservoir, of feeding means for the carbid, comprising a valve extending through an orifice in said carbid reservoir, said valve having lateral recesses of graduated capacity and being guided throughout its operative movement by the sides of said orifice.

19. In an acetylene generator, the combination with a water reservoir, of a carbid reservoir, means for feeding carbid from said carbid reservoir, said feeding means extending through an orifice in said carbid reservoir, and having one-or more partitions forming a plurality of graduated pockets,

the dimensions of said partition or partitions being related to the dimensions of said orifice to provide an open clearance between the edge of said partition or edges of said partitions and the sides of said orifice.

20. In an acetylene generator, the combi-' nation with a water reservoir, of a carbid reservoir, a feeding means for the carbid extending through an orifice in the carbid reservoir, said feeding means having one or more partitions forming a plurality of graduated apertures, the larger being above the smaller, the dimensions of said partition or partitions being related to the dimensions of said orifice to provide an open clearance between the edges of said partition or partitionsand the sides of said orifice, a yieldable element controlled by the pressure of the generated gas, and means whereby the feeding means is moved corresponding to the movement of said yieldable element.

21. In carbid feed mechanisms,the combination of a valve seat constituting a'feed passage and a feed plunger, circumferentially fitting said feed passage and having one or more openings for carrying the carbid, the termini of said opening or openings being at points inside the circumferential surface of said plunger to provide an open clearance between the sides of said valve seat and the termini of said opening or openings.

22. In 11 acetylene generator, a plunger having twoseries of recesses for carrying carbid, the outlets of one series of recesses being arranged on a differentside of the plunger than the outlets of the recesses of the other series and at different levels whereby masses of carbid are delivered alternately from different sides of the plunger upon the continued descent of the same.

In an-acetylene generator, a plunger having a plurality of graduated recesses for carrying carbid, the outlets of said recesses being arranged on different sides of the plunger and at different levels, whereby amounts of carbid corresponding to the graduated recesses are delivered alternately from different sides of the plunger upon the coninued descent of the same.

24. In an acetylene generator, the combivide a clearance and one or more apertures for carrying carbid disposed within theexpanse of said,cut-away'sides.

The combination of a carbid receptacle havlng a feed orifice with a reservoir for a reacting agent and, a reciprocatlng plunger for feeding carbid from said carbid recep-" tacle to the reacting agent in mechanically separated masses correspoinding to. a fixed or varied consumption of gas and capable of feeding one or more of said masses upon a single downward movement ofthe same,

said plunger comprising one or more partitions for separating the carbid into said masses, said partition or partitions being of less dimension than the dimension of said orifice to providean open clearance to pre-' vent the wedging of carbid between the partition or partitions and the sides of the feed orifice, thereby delivering said masses of carbid to the reacting agent without frictional interference between the carbid and the working parts.

26. The combination of a carbid receptacle having a feed orifice, a pressure diaphragm and a plunger having a series'of recesses at all times when within said receptacle directly exposed to the carbid therein, said )lunger being supported solely by said diaphragm and guided solely by the walls of said feed orifice. I

27. In combination, a carbid receptacle having a feed orifice, a plunger having a series of pockets and separating portions, said portions being of less cross section than the cross section of said feed orifice, a diaphragm, said plunger being supported solely by said vdiaphragn'i and guided solely by tb walls of said orifice. I

28. In carbid feed-mechanisms, a fe' dplunger haying at its circumference a reduced portion intersected by a perforation constituting a passage for carrying the carbid.

29. In carbid feed mechanisms, the combination of a water reservoir, a carbidholder, a flexible wall in the upper portion of said carbid-holder, a reciprocating member extendingthrough an orifice forming a feed passage between said carbid-holderand said reservoir and provided atits portion which is operatively related to said orifice with one or more partitions forming a plurality of carbid-carrying chambers, and means whereby said member is operatively actuated by said flexible wall, the dimension of said partition being less than the dimension of said orifice, whereby in the operation of said member an open space will exist'between said partition and the sides of said forming circumferential pockets for carrying the carbid, in combination with. a valve ring having an orifice approximately conforming to the circumference of the plunger above and below its feed-portion. 32. In carbid feed-mechanisms, a feedplunger having its feed-portion constituted by circumferential grooves with an inclined bottom wall or surfaces and intervening circumferential ribs or projecting portions forming circumferential pockets for carrying the carbid, in combination with a valve ring having an orifice approximately conforming to the circumference of the plunger above and below its feed-portion.

33. In carbid feed-mechanisms a feedplunger having its feed-portion constituted by a surface of circumferential irregularity forming circumferential pockets for carrying the carbid, in combination with a' valve ring having an orifice approximately conforming to the circumference of the plunger above and below its feed-portion.

34. In carbid feed-mechanisms, a feedplungerhaving its feed-portion constituted by a circumferential surface with circumferential ribs or projecting portions the projective extent of which is within the circumferential plane of the plunger and forming circumferential carbid.

35. In carbid feed-mechanisms, a feedplunger having its feed-portion constituted by a reduced stem-portion forming a circumferential space for carrying the carbid pockets for carrying the and having means within said space for restricting and governing the passage of the carbid,'in combination with a valve ring having an orifice approximately conforming to the circumference of the plunger above and below its feed-portion.

36. In carbid feed-mechanisms, a feedplunger having at its circumference a reduced portion. intersecting circumferential grooves constituting the feed-portion of the plunger and forming circumferential pock ets for carrying the carbid.

37. In carbid feed-mechanisms, the combination of a Valve-member constituting a feed-passage, and a reciprocating feed plunger circumferentially fitting said feedpassage at points above and below its feed portion and having its feed-portion constituted by a surface of circumferential irregularity forming circumferential pockets for carrying the carbid. l

38. In carbid feed-mechanisms, the combination of a valve-member constituting a feed-passage, and a reciprocating feed-plunger circumferentially fitting said feedpassage at pointsabove and below. its feed portion and having its feed-portion constituted by a circumferentially-corrugated sur-- face forming circumferential pockets for carrying the carbid.

In testimony whereof I aflix my signature in presence of two witnesses.

WILLIAM W. HARRIS. Witnesses HENRY J LUCKE, GEORGE N; Kenn. 

